58 Posts in 16 Topics by 18 members
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|Author||Topic: Is there a memory test software for the IIGS?||4533 Views|
27 February 2011 at 8:28am
I have just recently acquired a Woz Ltd Edition machine ROM 01. I'm having problems loading programs I download from this site and they don't work properly on my IIGS. My IIgs has a 1MB card in it however it is reporting only 1067KB in the BIOS setup. When I run the system without the card the BIOS reports it has having 256KB onboard. Something isn't right.
What I have been doing is downloading a few games on my Windows PC from this site and using a program called CiderPress to convert the 2MG files to DSK files. I then import those DSK files on my old Mac II which I then use Disk Copy 4.2 to make the 800KB diskettes for the IIgs.
Any help would be appreciated. Thanks.
28 February 2011 at 12:33pm
It's actually perfect timing you're asking for a Memory Test Software for the GS, because developer Geoff Weiss has just released version 2 of his memory test software:
The ShrinkIt (SHK) archive is at the top of the page.
You should be able to use CiderPress to unarchive Mega Memory Tester (MMT) and get it to a floppy via your Mac II.
It does look like something's screwy with your IIGS memory - with a 1 meg card installed you should be getting approximately 1.25 meg of RAM.
I don't own one myself, but if you search for Vince Briel's 4 meg RAM card for the IIGS, that's the most affordable solution for increasing RAM. Then there are cards that appear on eBay of course.
Hope that helps!
28 February 2011 at 6:47pm
Thanks for your reply. I will be sure to check that out. As it turns out the memory card's jumpers were improperly configured. The card was half populated and supposed to be 512KB. However when I put the card back into the system and started up with correct jumper settings I would get Fatal System Error messages. I was able to remove the defective RAM chips with an IC extractor. Now I have only 256KB on the card giving me a total of 512KB. I looked at Briel's 4MB card. Unfortunately he is out of stock now.
As a side note, the IIgs box I have also came with a highly sought after IIGS ROM 00 board which actually works. The person I acquired the system from upgraded the board to a ROM 01 but was kind enough to include the old ROM 00 board. I currently have the ROM 00 board on eBay.
2 March 2011 at 1:29pm
A bit of important advice when dealing with the Apple IIGS Memory Expansion Card...
- There are only 3 valid memory configurations that will work:
A) 256K (only built-in memory present--all sockets empty)
B) 512K (only TOP row of sockets populated)
C) 1024K (all sockets populated)
- For configuration "A", remove both jumper blocks. "B" only short *bottom* jumper pins. "C" short both sets of jumpers pins.
The card should look something like this with 512K:
|[AAAAAAAA] [BBBBBBBB] \
|[XXXXXXXX] [XXXXXXXX] |
You can populate it with 256Kx1 DRAMs (usually labeled "41256-15"). They only have to be 150ns or faster and must use CAS before RAS in the address order. Probably harder to find these than it was in the past. I still have a dozens of them (new) in shrink tubes when I bought out the remains of TMS Peripherals Apple II stock. Plus several dozen more pulled off of 8088, 286 and 386 motherboards.
Yep, testing the memory is a great idea. Incidentally, if you have AppleWorks GS, there is a memory test program on the 'Utilities' disk (though given the choice, I'd try something more modern). The built-in self test will test at least the on-board motherboard RAM. Press Apple-Option-Control-Reset and wait several minutes.
ps - There's no such thing as a ROM 00 motherboard per say. The ROM firmware chip plugged in (equivalent of a PC BIOS) is what made it either a ROM 00 or ROM 01. The '00' is 342-0077-A, while the '01' is 342-0077-B. Funny I still remember those part numbers in my head. :)
24 February 2014 at 2:11pm
Just trying to create the memory test disk. I've tried using ADT-PRO to create the diskette but it seems to load AppleCommand only and not the memory test program.
Could you let me know how I can create a Prodos disk with your program so I can test my expansion card?
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